CN103672943A - Elastic sealing sleeve device for floating tube sealing of air pre-heater - Google Patents

Elastic sealing sleeve device for floating tube sealing of air pre-heater Download PDF

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Publication number
CN103672943A
CN103672943A CN201310141231.XA CN201310141231A CN103672943A CN 103672943 A CN103672943 A CN 103672943A CN 201310141231 A CN201310141231 A CN 201310141231A CN 103672943 A CN103672943 A CN 103672943A
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CN
China
Prior art keywords
sealing
heat exchanger
exchanger tube
tube
cylinder
Prior art date
Application number
CN201310141231.XA
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Chinese (zh)
Other versions
CN103672943B (en
Inventor
魏振文
刘汝刚
崔建波
刘继成
张凤岐
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青岛德固特节能装备股份有限公司
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Priority to CN201310141231.XA priority Critical patent/CN103672943B/en
Publication of CN103672943A publication Critical patent/CN103672943A/en
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Publication of CN103672943B publication Critical patent/CN103672943B/en

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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00Combustion technologies with mitigation potential
    • Y02E20/34Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery

Abstract

According to the requirement for operation of an air pre-heater, a heat exchange tube stretches in a tube hole of an upper tube board, and air is not leaked. At present, the well known sealing structure is of a floating tube sealing structure which cannot easily ensure that the tube hole is sealed under the high temperature working state mainly because that the rigidity of a sealing sleeve is too large and the sealing sleeve cannot be sealed with a heat exchange tube with poor installation coaxiality. An elastic sealing sleeve device for floating tube sealing of the air pre-heater is composed of a packing gland, sealing packing, an elastic sealing sleeve, an upper tube board, a heat exchange tube and the like, and is characterized in that the elastic sealing sleeve is composed of an upper part, a middle part and a lower part, the upper part is a packing box, the lower part is a sealing ring, and the middle connection part is an elastic cylinder. As the elastic cylinder is arranged in the middle, the rigidity, in various directions, of the sealing ring is largely lowered, the sealing problems such as the poor installation coaxiality of the heat exchange tube can be solved under the high temperature working state, and therefore the hidden danger of occurrence of large-area fire of the upper tube board is eliminated, and the safety performance of the elastic sealing sleeve device is improved.

Description

Air preheater float tube sealed elastic sealing shroud device

Technical field

The present invention relates to a kind of carbon black production equipment, especially air preheater

Background technology

Air preheater service requirement heat exchanger tube is flexible and air tight at upper perforated plate pore; Once because gas leakage, high temperature carbon black smoke mixes energy initiation fire while reaching finite concentration with air; Single pore gas leakage can cause single hole Local Fire, and a plurality of pores leak gas simultaneously and can cause upper perforated plate large area fire, and this is serious accident.At present, known air preheater heat exchanger tube, at the device of the flexible sealing of upper perforated plate pore, is " a kind of sealing structure of floating pipe of air preheater " (patent No.: 200820176623.4); Fig. 2 is its structural representation, by sealing shroud (13), and airtight and watertight padding (14), gland (15), upper perforated plate (12), heat exchanger tube (11) forms; Sealing shroud top is stuffing box, and stuffing box is put into airtight and watertight padding (14) with after gland (15) compression, makes the sealing of upper perforated plate pore in the time of can testing shell side pressure at normal temperatures; High temperature lower seal filler has " ablation " phenomenon that its density is reduced, and sealing effectiveness declines, so, be not suitable with hot operation; An inner cylinder face contacting with heat exchanger tube is arranged at sealing shroud bottom, relies on this inner cylinder face to guarantee pore sealing during hot operation; Between inner cylinder face and heat exchanger tube, under normal temperature, have certain fit-up gap, hot operation state heat exchanger tube heats up and is radially expanded, and generally fit-up gap can be eaten up completely, reaches pore sealing.But 12 meters of air preheater heat exchanger tubes are how long, by the pipe of four sections of unlike materials, be welded, the linearity of postwelding pipe can not be out of question, and in four sections of pipes, having one section is high alloy cast tube, its extreme hardness, whole heat exchanger tube can not be aligned with straightener; So, heat exchanger tube and sealing shroud often have the rear bad situation of axiality of installing, especially meet heat exchanger tube and inner cylinder face and be skewed contactee, although heat exchanger tube has larger radially heat expansion strength, because sealing shroud rigidity is very large, heat exchanger tube rigidity is also very large, all being difficult to each other rectifies a deviation the other side to correct comes, therefore fit-up gap can not be eaten up completely, that is to say, this pore does not reach seal request; This situation is many, just has the danger that causes upper perforated plate large area fire, is the potential safety hazard of air preheater maximum.

Summary of the invention

In order to overcome the problems referred to above of existing sealing structure of floating pipe of air preheater, the invention provides a kind of air preheater float tube sealing structure, new construction can meet the sealing of pore under normal temperature, can guarantee again the sealing of hot operation state pore.

The technical solution adopted for the present invention to solve the technical problems is: air preheater float tube sealed elastic sealing shroud device, by gland (1), airtight and watertight padding (2), elastic seal cartridge (3), upper perforated plate (4) and heat exchanger tube (5) form, and it is characterized in that: elastic seal cartridge (3) is comprised of upper, middle, and lower part, and top is stuffing box (T), bottom is sealing ring (H), and middle interconnecting piece is spring cylinder (R), elastic seal cartridge top is welded on upper perforated plate pore, in, lower two parts are suspended in below pore, heat exchanger tube is vertically arranged in elastic seal cartridge, after putting into airtight and watertight padding in stuffing box and compressing with gland, can meet the sealing of heat exchanger tube and pore under normal temperature, the lower seal rings of elastic seal cartridge, it has an inner cylinder face contacting with heat exchanger tube, under normal temperature, between this inner cylinder face and heat exchanger tube, there is certain fit-up gap, under hot operation state, heat exchanger tube heat expansion diameter becomes large, can eat up fit-up gap completely, reach pore sealing, both after having made to meet heat exchanger tube and inner cylinder face installation, axiality was bad, be skewed contactee no exception, because sealing ring is connected on the good spring cylinder of elasticity, each reduces greatly to rigidity to make sealing ring, the radially heat expansion power of heat exchanger tube is enough to make sealing ring angular displacement, force inner cylinder face and heat exchanger tube to be adjacent to comprehensively, eat up whole fit-up gaps, reach pore sealing.

The invention has the beneficial effects as follows: Xinmi City's big envelope has improved elasticity, solved in the past because rigidity is unfavorable for too greatly pore elevated-temperature seal problem, eliminated the hidden danger that upper perforated plate large area fire occurs, greatly improved the security performance of equipment.

Accompanying drawing explanation

Below in conjunction with drawings and Examples, the present invention is further described.

Fig. 1 is air preheater float tube sealed elastic sealing shroud apparatus structure schematic diagram and embodiment.

Fig. 2 is known sealing structure of floating pipe of air preheater schematic diagram.

1. glands in Fig. 1,2. airtight and watertight padding, 3. elastic seal cartridge, 4 upper perforated plates, 5 heat exchanger tubes, the top stuffing box part of T elastic seal cartridge, the middle part spring cylinder part of R elastic seal cartridge, the lower seal loop section of H elastic seal cartridge.

11. heat exchanger tubes in Fig. 2,12. upper perforated plates, 13. sealing shrouds, 14. airtight and watertight paddings, 15. glands.

The specific embodiment

In Fig. 1, elastic seal cartridge (3) is welded to tube sheet (4) upper, heat exchanger tube (5) is put in elastic seal cartridge, and airtight and watertight padding (2) is put in stuffing box, with gland (1), compresses, and can make pore sealing under normal temperature.

In Fig. 1, elastic seal cartridge divides upper, middle, and lower part, and middle part spring cylinder (R) wherein can be taked to process corrugated cross section in the get on the bus way of inside and outside groove of lathe, also can take " many ripples of hydraulic pressure once-forming method " to process corrugated cross section, in order to improve its elasticity.

Claims (1)

1. air preheater float tube sealed elastic sealing shroud device, by gland (1), airtight and watertight padding (2), elastic seal cartridge (3), upper perforated plate (4) and heat exchanger tube (5) form, and it is characterized in that: elastic seal cartridge (3) is comprised of upper, middle, and lower part, and top is stuffing box (T), bottom is sealing ring (H), and middle interconnecting piece is spring cylinder (R), elastic seal cartridge top is welded on upper perforated plate pore, in, lower two parts are suspended in below pore, heat exchanger tube is vertically arranged in elastic seal cartridge, after putting into airtight and watertight padding in stuffing box and compressing with gland, can meet the sealing of heat exchanger tube and pore under normal temperature, the lower seal rings of elastic seal cartridge, it has an inner cylinder face contacting with heat exchanger tube, under normal temperature, between this inner cylinder face and heat exchanger tube, there is certain fit-up gap, under hot operation state, heat exchanger tube heat expansion diameter becomes large, can all eat up fit-up gap, reach pore sealing, both having made to meet heat exchanger tube and inner cylinder face, that axiality is installed is bad, be skewed contactee no exception, because sealing ring is connected on the good spring cylinder of elasticity, each reduces greatly to rigidity to make sealing ring, the radially heat expansion power of heat exchanger tube is enough to make sealing ring angular displacement, force inner cylinder face and heat exchanger tube to be adjacent to comprehensively, eat up whole fit-up gaps, reach pore sealing.
CN201310141231.XA 2013-04-12 2013-04-12 Air preheater float tube sealed elastic sealing shroud device CN103672943B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201310141231.XA CN103672943B (en) 2013-04-12 2013-04-12 Air preheater float tube sealed elastic sealing shroud device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201310141231.XA CN103672943B (en) 2013-04-12 2013-04-12 Air preheater float tube sealed elastic sealing shroud device

Publications (2)

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CN103672943A true CN103672943A (en) 2014-03-26
CN103672943B CN103672943B (en) 2016-02-17

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104713404A (en) * 2015-03-14 2015-06-17 青岛德固特节能装备股份有限公司 Vertical column tube heat exchanger floating tube sealing structure
CN105092120A (en) * 2015-07-30 2015-11-25 青岛德固特节能装备股份有限公司 Heat exchange tube thermal expansion mobile resistance simulation measuring apparatus and method
CN105757691A (en) * 2016-02-27 2016-07-13 青岛德固特节能装备股份有限公司 Soot blower structure and related making method
CN107449314A (en) * 2017-07-24 2017-12-08 青岛德固特节能装备股份有限公司 A kind of metallic sheath float tube sealing structure
CN110081175A (en) * 2019-04-11 2019-08-02 芜湖新兴铸管有限责任公司 A kind of lime preheater push rod seal device

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3559730A (en) * 1968-03-08 1971-02-02 Tunzini Ameliorair Soc Tubular heat exchanger
US3583478A (en) * 1967-07-21 1971-06-08 Ferodo Sa Multitube radiator
CN2789609Y (en) * 2005-05-16 2006-06-21 中橡集团炭黑工业研究设计院 Air preheater
CN201302420Y (en) * 2008-11-06 2009-09-02 青岛德固特机械制造有限公司 Sealing structure of floating pipe of air preheater
CN202733297U (en) * 2012-06-08 2013-02-13 宝钢不锈钢有限公司 Composite compensation device for thermal expansion of pipeline
CN103216699A (en) * 2012-01-18 2013-07-24 金沙 Detachable expansion joint compensator device

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3583478A (en) * 1967-07-21 1971-06-08 Ferodo Sa Multitube radiator
US3559730A (en) * 1968-03-08 1971-02-02 Tunzini Ameliorair Soc Tubular heat exchanger
CN2789609Y (en) * 2005-05-16 2006-06-21 中橡集团炭黑工业研究设计院 Air preheater
CN201302420Y (en) * 2008-11-06 2009-09-02 青岛德固特机械制造有限公司 Sealing structure of floating pipe of air preheater
CN103216699A (en) * 2012-01-18 2013-07-24 金沙 Detachable expansion joint compensator device
CN202733297U (en) * 2012-06-08 2013-02-13 宝钢不锈钢有限公司 Composite compensation device for thermal expansion of pipeline

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104713404A (en) * 2015-03-14 2015-06-17 青岛德固特节能装备股份有限公司 Vertical column tube heat exchanger floating tube sealing structure
CN105092120A (en) * 2015-07-30 2015-11-25 青岛德固特节能装备股份有限公司 Heat exchange tube thermal expansion mobile resistance simulation measuring apparatus and method
CN105757691A (en) * 2016-02-27 2016-07-13 青岛德固特节能装备股份有限公司 Soot blower structure and related making method
CN105757691B (en) * 2016-02-27 2019-09-20 青岛德固特节能装备股份有限公司 A kind of related production of soot blower structure
CN107449314A (en) * 2017-07-24 2017-12-08 青岛德固特节能装备股份有限公司 A kind of metallic sheath float tube sealing structure
CN110081175A (en) * 2019-04-11 2019-08-02 芜湖新兴铸管有限责任公司 A kind of lime preheater push rod seal device

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